WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Permanent URI for this collectionhttps://hdl.handle.net/20.500.11779/256

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Now showing 1 - 20 of 453

Citation - Scopus: 2
Turcoins: Turkish Republic Coin Dataset
(IEEE, 2021) Gökberk, Berk; Akarun, Lale; Temiz, Hüseyin
In this paper, we present a novel and comprehensive dataset which contains Turkish Republic coins minted since 1924 and present a deep learning based system that can automatically classify coins. The proposed dataset consists of 11080 coin images from 138 different classes. To classify coins, we utilize a pre-trained neural network (ResNet50) which is pre-trained on ImageNet. We train the pre-trained neural networks on our dataset by transfer learning. The imbalanced nature of the dataset causes the classifier to show lower performance in classes with fewer samples. To alleviate the imbalance problem, we propose a StyleGAN2-based augmentation method providing realisticfake coins for rare classes. The dataset will be published in http://turcoins.
Citation - WoS: 22
Citation - Scopus: 25
Perceptions of Dating Violence: Assessment and Antecedents
(SAGE Publications, 2020) Toplu-Demirtaş, Ezgi; Fincham, Frank D.; Öztemür, Gizem
Challenging perceptions of violence is crucial to prevent dating violence (DV), because such perceptions intervene in the organization and interpretation of violent events. However, these perceptions have received limited attention. This likely reflects the lack of a psychometric tool to do so. The current study had two purposes: to develop a measure of perceptions of psychological, sexual, and physical DV, and to explore how vertical collectivism, through hostile sexism and violence myth acceptance, shapes perceptions of DV. A total of 491 college students (55.3% women; M = 20.76 years, SD = 1.77 years) completed measures of the vertical collectivism, hostile sexism, domestic violence myth acceptance, and perceptions of DV. The results of exploratory factor analyses revealed a 15-item single-factor measure of perceptions of DV as initial construct validity, which had satisfactory internal consistency. A gender difference emerged in perceptions of DV; college women perceived psychological, sexual, and physical DV as more serious compared with college men. Moreover, the association between vertical collectivism and perceptions of DV was serially mediated via hostile sexism and violence myth acceptance. The findings are discussed in terms of previous research and the need to address the role of vertical collectivism in sexism, myth acceptance, and perceptions of violence in prevention/intervention efforts to reduce vulnerability to DV perpetration and victimization. Several recommendations are outlined to facilitate future research.
Citation - WoS: 2
Citation - Scopus: 5
Increasing Procurement Efficiency Through Optimal E-Commerce Enablement Scheduling
(Emerald Group Publishing Ltd., 2019) Özlük, Özgür; Cholette, Susan; Clark, Andrew G
Purpose: This study aims to show how cost savings can be achieved through optimizing the scheduling of e-commerce enablements. The University of California is one of the largest, most prestigious public education and research systems in the world, yet diminished state support is driving the search for system-wide cost savings. Design/methodology/approach: This study documents the preparation for and rollout of an e-procurement system across a subset of campuses. A math programing tool was developed for prioritizing the gradual rollout to generate the greatest expected savings subject to resource constraints. Findings: The authors conclude by summarizing the results of the rollout, discussing lessons learned and their benefit to decision-makers at other public institutions. Originality/value: The pilot program comprising three campuses has been predicted to yield $1.2m in savings over a one-year period; additional sensitivity analysis with respect to savings, project timelines and other rollout decisions illustrate the robustness of these findings.
Citation - WoS: 3
Citation - Scopus: 4
A Novel Graph Transformation Strategy for Optimizing Sptrsv on Cpus
(Wiley, 2023) Yılmaz, Buse
Sparse triangular solve (SpTRSV) is an extensively studied computational kernel. An important obstacle in parallel SpTRSV implementations is that in some parts of a sparse matrix the computation is serial. By transforming the dependency graph, it is possible to increase the parallelism of the parts that lack it. In this work, we present a novel graph transformation strategy to increase the parallelism degree of a sparse matrix and compare it to our previous strategy. It is seen that our transformation strategy can provide a speedup as high as 1.42x$$ 1.42x $$.
Citation - WoS: 16
Citation - Scopus: 20
Selecting Suicide Ideation Assessment Instruments: a Meta-Analytic Review
(SAGE Publications, 2017) Duncan, Kelly; Atalay, Zümra; Erford, Bradley T.; Jackson, Jessica; Bardhoshi, Gerta
Psychometric meta-analyses and reviews were provided for four commonly used suicidal ideation instruments: the Beck Scale for Suicide Ideation, the Suicide Ideation Questionnaire, the Suicide Probability Scale, and Columbia–Suicide Severity Rating Scale. Practical and technical issues and best use recommendations for screening and outcome research are offered.
Citation - WoS: 1
Citation - Scopus: 1
Developmental Differences in Children and Adults' Enforcement of Explore Versus Exploit Search Strategies in the United States and Turkey
(Wiley, 2024) Kiefer, Sarah L.; Aksu, Ece; Şen, Hilal H.; Lucca, Kelsey
Across development, as children acquire a deeper understanding of their environment, they explore less and take advantage, or "exploit," what they already know. Here, we test whether children also enforce exploration-oriented search behaviors onto others. Specifically, we ask whether children are more likely to encourage a search agent to explore versus exploit their environment, and whether this pattern varies across childhood (between 3 and 6 years). We also ask whether this pattern differs between children and adults, and generalizes across two different sociocultural contexts-Turkey and the United States-that differ on dimensions that might relate to children's decisions about exploration (e.g., curiosity-focused educational practices, attitudes toward uncertainty avoidance). Participants (N = 358) watched an agent search for rewards and were asked at various points whether the agent should "stay" (exploit) in their current location, or "go" (explore) to a new location. At all points in the experiment, children enforced exploration significantly more often than adults. Early in the agent's search, children in the US enforced exploration more often than children in Turkey; later in the search, younger children (from both sociocultural contexts) were more likely to continue enforcing exploration compared to older children. These findings highlight that children are not only highly exploratory themselves, but also enforce exploration onto others-underscoring the central role that exploration plays in driving early cognitive development across diverse sociocultural contexts.Research Highlights The current study examined developmental and cross-cultural differences in children and adults' enforcement of explore-exploit search strategies. Children in the US and Turkey enforced exploration more than adults, who enforced exploitation more often; results were generally consistent across cultures with small differences. Mirroring developmental changes in children's own search behavior; the tendency to enforce exploration decreased between 3- to 6-years of age. Findings underscore the central role of an "exploration mindset" in children's early decision-making-even when exploration has no direct benefits to the child themselves.
Citation - WoS: 2
Citation - Scopus: 2
Classification of Altruistic Punishment Decisions by Optical Neuroimaging and Machine Learning Methods
(IEEE, 2023) Erözden, Ozan; Şahin, Türkay; Akyürek, Güçlü; Filiz, Gözde; Çakar, Tuna
Altruistic punishment (third-party punishment) is important in terms of maintaining social norms and promoting prosocial behavior. This study examined data obtained using the near infrared spectroscopy (fNIRS) method to predict altruistic punishment decisions. It was found that specific neural activity patterns were significantly related to decisions regarding the punishment of the perpetrator. This research contributes to the development of social decision-making models and helps advance our understanding of the cognitive and neural processes involved in third-party punishments.
Citation - WoS: 1
Citation - Scopus: 1
A Novel Tunable Vortex-Induced Vibration Wind Energy Harvester
(Ieee, 2024) Dorantes Gonzalez, Dante Jorge
This study presents a novel approach to enhancing the efficiency and robustness of vortex-induced vibration energy harvesters for wind energy conversion. Through the development and evaluation of alternative tunable stiffness mechanisms, particularly focusing on a discrete-tunable mechanism with three levels of torsional springs, significant improvements in energy capture and construction simplicity have been achieved. By optimizing dynamic models and conducting thorough structural analyses, potential weaknesses in the design have been identified and addressed. The innovative tunable mechanism, currently undergoing patent review, represents a substantial advancement in the field of renewable energy technologies, offering a promising solution for urban energy harvesting applications. This research underscores the importance of continuous innovation and optimization in energy harvesting systems to meet the evolving demands for sustainable energy production.
Citation - Scopus: 5
An Antipodal Vivaldi Antenna Design for Torso Imaging in a Coupling Medium
(IEEE, 2021) Çayören, Mehmet; Bilgin, Egemen; Joof, Sulayman; Doğu, Semih
An antipodal Vivaldi antenna designed to operate in a coupling medium with a relative dielectric constant of epsilon(r) = 25 for microwave imaging of torso is presented in this paper. The proposed antenna is similar to the conventional antipodal Vivaldi antenna but with optimized parameters to radiate in the desired coupling medium. The antenna has a size of 120x70 mm(2) and operating over 230-1000 MHz frequency bandwidth with a peak gain of 5.42 dBi and peak front-to-back ratio of 143 dB. The designed antenna shows a better performance compared to other antennas used for microwave torso imaging. To assess the actual performance, a realistic human torso phantom is implemented to detect the water accumulation in the lungs, and as the inversion method linear sampling method is used. The 3-D reconstruction results show that the proposed antenna can be a candidate for microwave torso imaging applications.
Citation - WoS: 30
Citation - Scopus: 27
Drivers of Cultural Success: the Case of Sensory Metaphors
(2015) Berger, Jonah; Akpınar, Ezgi
Why do some cultural items catch on and become more popular than others? Language is one of the basic foundations of culture. But what leads some phrases to become more culturally successful? There are multiple ways to convey the same thing and phrases with similar meanings often act as substitutes, competing for usage. A not so friendly person, for example, can be described as unfriendly or cold. We study how the senses shape cultural success, suggesting that compared with their semantic equivalents (e.g., unfriendly person), phrases which relate to senses in metaphoric ways (e.g., cold person) should be more culturally successful. Data from 5 million books over 200 years support this prediction: Sensory metaphors are used more frequently over time than are their semantic equivalents. Experimental evidence demonstrates that sensory metaphors are more memorable because they relate more to the senses and have more associative cues. These findings shed light on how senses shape language and the psychological foundations of culture more broadly.
Citation - WoS: 52
Citation - Scopus: 60
De-Europeanisation in Turkey: the Case of the Rule of Law
(Taylor & Francis, 2016) Saatçioğlu, Beken
This article investigates the political dynamics shaping the post-2010 ‘de-Europeanisation’ of Turkey’s judicial system, particularly regarding judicial independence and rule of law. The analysis suggests the limits of conventional Europeanisation accounts emphasising causal factors such as European Union (EU) conditionality and the ‘lock-in effects’ of liberal reforms due to the benefits of EU accession. The article argues that the Justice and Development Party’s (AKP’s) bid for political hegemony resulted in the reversal of rule of law reforms. De-Europeanisation is discussed in terms of both legislative changes and the government’s observed discourse shift.
A Comparative Analysis of the Health Care Utilization and Costs of Patients Diagnosed With and Without Liver Cancer in the Us Medicare Population
(2017) Ogbomo, A.; Lin, Y.; Keshishian, A; Xie, L; Yuce, H; Başer, Onur
...
Strategic Fixed-Asset Management (capital Budgeting) in Small and Medium Sized Businesses
(Emerald Group Publishing Ltd., 2015) Karadağ, Hande
...
Spatial Distribution of the Total Number of Medical Devices in Turkey: a Classification Analysis
(2016) Cinaroğlu, S.; Başer, Onur
Objectives: The unbalanced distribution of medical technologies and devices between rural and urban areas is a major problem for developing countries including Turkey. After the establishment of Public Hospital Unions (PHUs) in Turkey, legislative changes were made to improve the autonomy of public hospitals. This study utilizes spatial analysis to assess the distribution of medical device use in Turkey using PHUs as a decision making unit. Methods: Data from the PHUs’ statistics year book for the year 2014 was assessed. The total number of PHUs is 89. A Hierarchical cluster analysis was performed to classify PHUs according to the total number of medical devices. The Euclidean distance measure and Wards methods were used in the analysis for classification. Results: Study results show that, in Turkey, PHUs were categorized into two clusters based on the total number of medical devices available. Regarding the spatial distribution of the clusters, the first cluster represents PHUs in rural areas, and the second represents PHUs located in urban areas of Turkey. PHUs representing large cities with high population density were included in one cluster, and all other PHUs were included in the second. Statistical test results indicated that the two clusters differ according to the total number of magnetic resonance imaging (MRI: t= -14.10, p< 0.01), computed tomography (CT) scan (t= -15.75, p< 0.01), mammography (t= -11.40, p< 0.01), ultrasonography (t= -14.62, p< 0.01), and electrocardiography (EKG; t= -12.29, p< 0.01) equipment available. Conclusions: It is advisable for health policy makers and health technology assessment authorities in Turkey to focus on the differences between rural and urban areas of the country when determining the need for medical devices.
The Role English Plays in the Construction of Professional Identities in Nest-Nnes Bilingual Marriages in İstanbul
(Palgrave, 2015) Kurban, Caroline Fell
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Citation - WoS: 3
Citation - Scopus: 2
A Benchmark Dataset for Turkish Data-To Generation
(Elsevier, 2022) Demir, Şeniz; Öktem, Seza
In the last decades, data-to-text (D2T) systems that directly learn from data have gained a lot of attention in natural language generation. These systems need data with high quality and large volume, but unfortunately some natural languages suffer from the lack of readily available generation datasets. This article describes our efforts to create a new Turkish dataset (Tr-D2T) that consists of meaning representation and reference sentence pairs without fine-grained word alignments. We utilize Turkish web resources and existing datasets in other languages for producing meaning representations and collect reference sentences by crowdsourcing native speakers. We particularly focus on the generation of single-sentence biographies and dining venue descriptions. In order to motivate future Turkish D2T studies, we present detailed benchmarking results of different sequence-to-sequence neural models trained on this dataset. To the best of our knowledge, this work is the first of its kind that provides preliminary findings and lessons learned from the creation of a new Turkish D2T dataset. Moreover, our work is the first extensive study that presents generation performances of transformer and recurrent neural network models from meaning representations in this morphologically-rich language.
Citation - WoS: 10
Citation - Scopus: 12
Implications of Site Specific Response Analysis
(Springer, 2018) Tönük, Gökçe; Kurtuluş, Aslı; Ansal, Atilla
Definition of design earthquake characteristics, more specifically uniform hazard acceleration response spectrum, on the ground surface is the primary component for performance based design of structures and assessment of seismic vulnerabilities in urban environments. The adopted approach for this purpose requires a probabilistic local seismic hazard assessment, definition of representative site profiles down to the engineering bedrock, and 1D or 2D quivalent or nonlinear, total or effective stress site response analyses depending on the complexity and importance of the structures to be built. Thus, a site-specific response analysis starts with the probabilistic estimation of regional seismicity and earthquake source characteristics, soil stratification, engineering properties of encountered soil layers in the soil profile. The local seismic hazard analysis would yield probabilistic uniform hazard acceleration response spectrum on the bedrock outcrop. Thus, site specific response analyses also need to produce a probabilistic uniform hazard acceleration response spectrum on the ground surface. A general review will be presented based on the previous studies conducted by the author and his co-workers in comparison to major observations and methodologies to demonstrate the implications of site-specific response analysis.
Interplay of Neighborhood and Psychosocial Factors in Predicting Trajectories of Allostatic Load Among Latinx Adults in the United States
(SAGE Publications Inc., 2025) Gutiérrez, Á.; Supiyev, A.; Thomas Tobin, C.; Sevi, B.; Marroig, A.; Voll, S.; Muniz-Terrera, G.
Research highlights the independent roles of neighborhood and psychosocial risk and protective factors for accelerated physiological aging. However, the combined role of neighborhood and psychosocial factors for allostatic load among Latinx adults in the U.S. remains unclear. Informed by the Health Disparities Framework, the study aims are to: (1) examine the direct associations between neighborhood (cohesion and disorder) and psychosocial (loneliness) factors, respectively, and allostatic load trajectories; and (2) determine whether family social support moderates the association between loneliness and allostatic load trajectories. Data for Latinx adults ages ≥50 (n = 319) are from the Health and Retirement Study (waves 2006–2016). Linear mixed models estimated baseline and rate of change in allostatic load, adjusting for sociodemographics. Loneliness was positively associated with baseline allostatic load. This association persisted when we considered neighborhood factors. Family social support moderated the association between loneliness and allostatic load slope. As neighborhood features, loneliness, and physiological dysregulation are each associated with worse cognitive outcomes, findings underscore the protective role of family social support for physiological dysregulation, thereby promoting cognitive resilience. © The Author(s) 2025.
Citation - WoS: 13
Citation - Scopus: 14
The Timing Database: an Open-Access, Live Repository for Interval Timing Studies
(Springer, 2023) Brochard, Renaud; Karşılar, Hakan; Akdoğan, Başak; De Corte, Benjamin; Aydoğan, Turaç; Baccarani, Alessia; Duyan, Yalçın Akın
Interval timing refers to the ability to perceive and remember intervals in the seconds to minutes range. Our contemporary understanding of interval timing is derived from relatively small-scale, isolated studies that investigate a limited range of intervals with a small sample size, usually based on a single task. Consequently, the conclusions drawn from individual studies are not readily generalizable to other tasks, conditions, and task parameters. The current paper presents a live database that presents raw data from interval timing studies (currently composed of 68 datasets from eight different tasks incorporating various interval and temporal order judgments) with an online graphical user interface to easily select, compile, and download the data organized in a standard format. The Timing Database aims to promote and cultivate key and novel analyses of our timing ability by making published and future datasets accessible as open-source resources for the entire research community. In the current paper, we showcase the use of the database by testing various core ideas based on data compiled across studies (i.e., temporal accuracy, scalar property, location of the point of subjective equality, malleability of timing precision). The Timing Database will serve as the repository for interval timing studies through the submission of new datasets.
Citation - WoS: 6
Citation - Scopus: 6
Should I Invite Them? Bystanders' Inclusivity Judgements Towards Outgroup Victims and Ingroup Bullies in Intergroup Bullying
(Wiley, 2021) Mulvey, Kelly Lynn; Gönültaş, Seçil; Yavuz, H Melis
This study examined bystanders' judgements of bullying and their inclusivity towards refugee victims and ingroup bully peers. Participants included 587 Turkish adolescents (M-age = 13.14, SD = 1.60) who were presented with two stories: intergroup (Syrian refugee victim) and intragroup (Turkish victim) bullying. They indicated acceptability of bullying, retaliation, and how likely they would be to include victims and bullies in different social contexts. Empathy, prejudice, desired social distance, and peer norms towards Syrian refugees were examined as predictors. Adolescents in schools with a higher number of Syrian peers were more likely to expect they would include the Syrian victim than adolescents in schools with a lower number of Syrian peers. Further, adolescents with higher empathy were more likely to include the Syrian victim while adolescents with higher prejudice and desired social distance were less likely to include the Syrian victim. The results highlight the importance of attending to bystanders' future interactions with victims and bullies, as bystanders have the opportunity to challenge injustice by promoting inclusive school climates in diverse societies. Please refer to the Supplementary Material section to find this article's Community and Social Impact Statement.

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